Memory and fork problem with Nagios 2.9

[stefano ghelfi]

Hi list,
I'm quit new to Nagios, and I would know if someone can help me.

This is my enviroment:
 - VMWare Virtual machine running over Microsoft Windows [Version 5.2.3790] with 2 GB RAM
 - Red Hat Enterprise Linux Server release 5 (Tikanga) installed on the VM
 - NAGIOS 2.9 with embedded perl
 - NET-SNMP

I'm testing this enviroment to monitor some network devices using snmp plugins (I wasn't able to run the plugins without embedded perl). At the moment I'm monitoring 17 hosts (Routers, switches and 1 firewall) and 70 services (especially ports on routers with "check_ifstatus" plugin).

My problem is that all the time that I start Nagios, very slowly, memory used by Nagios goes up (And I see that memory used by nagios childs to execute plugins is the same as the parent process) until I begin to find in nagios.log the message: "Warning: The check of service 'xxx' on host 'yyy' could not be performed due to a fork() error.  The check will be rescheduled.". If I restart Nagios the situations is always the same (It takes a couple of days to arrive to the critical state)

First I though about a problem with Nagios configuration but after some tuning I'm quite sure that the configuration is ok (No problem with user configuration or "service_reaper_frequency").

I read a post that was talking about known memory leak problems with embedded perl, could anyone explain to me a little bit better the problem?

Is there any workaround or patch?

Thankyou very much for the help
- stefano ghelfi (Stiuz)

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